/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:12:58,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:12:58,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:12:58,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:12:58,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:12:58,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:12:58,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:12:58,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:12:58,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:12:58,547 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:12:58,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:12:58,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:12:58,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:12:58,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:12:58,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:12:58,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:12:58,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:12:58,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:12:58,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:12:58,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:12:58,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:12:58,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:12:58,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:12:58,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:12:58,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 06:12:58,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 06:12:58,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 06:12:58,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 06:12:58,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 06:12:58,603 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 06:12:58,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:12:58,605 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:12:58,606 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:12:58,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:12:58,609 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:12:58,609 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:12:58,610 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:12:58,610 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:12:58,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:12:58,612 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:12:58,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:12:58,614 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:12:58,671 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:12:58,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:12:58,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:12:58,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:12:58,677 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:12:58,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:12:58,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:12:58,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:12:58,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:12:58,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:12:58,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:12:58,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:12:58,680 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:12:58,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:12:58,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:12:58,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:12:58,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:12:58,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:12:58,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:12:58,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:12:58,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:12:58,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:12:58,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:12:58,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:12:58,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:12:58,683 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:12:59,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:12:59,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:12:59,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:12:59,139 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:12:59,139 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:12:59,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2020-12-23 06:12:59,234 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7b0eddefa/93c5b871cf4047c9904e7c50cb1a0939/FLAGf5cd54158 [2020-12-23 06:13:00,015 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:13:00,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2020-12-23 06:13:00,042 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7b0eddefa/93c5b871cf4047c9904e7c50cb1a0939/FLAGf5cd54158 [2020-12-23 06:13:00,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7b0eddefa/93c5b871cf4047c9904e7c50cb1a0939 [2020-12-23 06:13:00,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:13:00,238 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:13:00,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:13:00,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:13:00,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:13:00,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:13:00" (1/1) ... [2020-12-23 06:13:00,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b728926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:13:00, skipping insertion in model container [2020-12-23 06:13:00,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:13:00" (1/1) ... [2020-12-23 06:13:00,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:13:00,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:13:00,742 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~ptr~0,],base],StructAccessExpression[IdentifierExpression[~ptr~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~ptr~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~ptr~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~node~0,],base],StructAccessExpression[IdentifierExpression[~node~0,],offset]]] left hand side expression in assignment: address: IdentifierExpression[~ppnode,] left hand side expression in assignment: address: IdentifierExpression[~pp2,] left hand side expression in assignment: address: IdentifierExpression[~pp1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~next~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~next~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~list,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~list,],base],StructAccessExpression[IdentifierExpression[~list,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~list,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~list,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~list,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~list,],base],StructAccessExpression[IdentifierExpression[~list,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~list,] left hand side expression in assignment: lhs: VariableLHS[~beg,] left hand side expression in assignment: lhs: VariableLHS[~beg,] left hand side expression in assignment: lhs: VariableLHS[~beg,] left hand side expression in assignment: lhs: VariableLHS[~beg,] left hand side expression in assignment: lhs: VariableLHS[~list~1,] [2020-12-23 06:13:00,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:13:00,837 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:13:00,908 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~ptr~0,],base],StructAccessExpression[IdentifierExpression[~ptr~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~ptr~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~ptr~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~node~0,],base],StructAccessExpression[IdentifierExpression[~node~0,],offset]]] left hand side expression in assignment: address: IdentifierExpression[~ppnode,] left hand side expression in assignment: address: IdentifierExpression[~pp2,] left hand side expression in assignment: address: IdentifierExpression[~pp1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~next~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~next~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~list,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~list,],base],StructAccessExpression[IdentifierExpression[~list,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~list,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~list,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~list,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~list,],base],StructAccessExpression[IdentifierExpression[~list,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~list,] left hand side expression in assignment: lhs: VariableLHS[~beg,] left hand side expression in assignment: lhs: VariableLHS[~beg,] left hand side expression in assignment: lhs: VariableLHS[~beg,] left hand side expression in assignment: lhs: VariableLHS[~beg,] left hand side expression in assignment: lhs: VariableLHS[~list~1,] [2020-12-23 06:13:00,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:13:01,004 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:13:01,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:13:01 WrapperNode [2020-12-23 06:13:01,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:13:01,006 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:13:01,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:13:01,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:13:01,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:13:01" (1/1) ... [2020-12-23 06:13:01,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:13:01" (1/1) ... [2020-12-23 06:13:01,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:13:01,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:13:01,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:13:01,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:13:01,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:13:01" (1/1) ... [2020-12-23 06:13:01,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:13:01" (1/1) ... [2020-12-23 06:13:01,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:13:01" (1/1) ... [2020-12-23 06:13:01,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:13:01" (1/1) ... [2020-12-23 06:13:01,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:13:01" (1/1) ... [2020-12-23 06:13:01,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:13:01" (1/1) ... [2020-12-23 06:13:01,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:13:01" (1/1) ... [2020-12-23 06:13:01,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:13:01,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:13:01,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:13:01,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:13:01,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:13:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:13:01,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 06:13:01,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-23 06:13:01,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:13:01,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-23 06:13:01,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:13:01,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-23 06:13:01,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:13:01,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:13:01,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:13:02,253 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:13:02,253 INFO L299 CfgBuilder]: Removed 137 assume(true) statements. [2020-12-23 06:13:02,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:13:02 BoogieIcfgContainer [2020-12-23 06:13:02,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:13:02,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:13:02,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:13:02,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:13:02,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:13:00" (1/3) ... [2020-12-23 06:13:02,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6580cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:13:02, skipping insertion in model container [2020-12-23 06:13:02,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:13:01" (2/3) ... [2020-12-23 06:13:02,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6580cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:13:02, skipping insertion in model container [2020-12-23 06:13:02,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:13:02" (3/3) ... [2020-12-23 06:13:02,264 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2020-12-23 06:13:02,271 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:13:02,276 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 20 error locations. [2020-12-23 06:13:02,295 INFO L253 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2020-12-23 06:13:02,323 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:13:02,323 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:13:02,323 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:13:02,323 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:13:02,323 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:13:02,324 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:13:02,324 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:13:02,324 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:13:02,348 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states. [2020-12-23 06:13:02,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 06:13:02,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:13:02,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:13:02,356 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:13:02,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:13:02,363 INFO L82 PathProgramCache]: Analyzing trace with hash 586891724, now seen corresponding path program 1 times [2020-12-23 06:13:02,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:13:02,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60395686] [2020-12-23 06:13:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:13:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:13:02,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60395686] [2020-12-23 06:13:02,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:13:02,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:13:02,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205704609] [2020-12-23 06:13:02,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:13:02,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:13:02,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:13:02,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:13:02,578 INFO L87 Difference]: Start difference. First operand 147 states. Second operand 2 states. [2020-12-23 06:13:02,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:13:02,620 INFO L93 Difference]: Finished difference Result 292 states and 486 transitions. [2020-12-23 06:13:02,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:13:02,622 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-12-23 06:13:02,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:13:02,634 INFO L225 Difference]: With dead ends: 292 [2020-12-23 06:13:02,635 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 06:13:02,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:13:02,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 06:13:02,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2020-12-23 06:13:02,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-23 06:13:02,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2020-12-23 06:13:02,720 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 13 [2020-12-23 06:13:02,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:13:02,721 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2020-12-23 06:13:02,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:13:02,721 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2020-12-23 06:13:02,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:13:02,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:13:02,722 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:13:02,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:13:02,723 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:13:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:13:02,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1788456629, now seen corresponding path program 1 times [2020-12-23 06:13:02,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:13:02,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813280555] [2020-12-23 06:13:02,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:13:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:13:03,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813280555] [2020-12-23 06:13:03,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:13:03,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-23 06:13:03,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749088089] [2020-12-23 06:13:03,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:13:03,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:13:03,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:13:03,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:13:03,369 INFO L87 Difference]: Start difference. First operand 141 states and 152 transitions. Second operand 12 states. [2020-12-23 06:13:04,291 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-12-23 06:13:04,441 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-12-23 06:13:05,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:13:05,057 INFO L93 Difference]: Finished difference Result 234 states and 252 transitions. [2020-12-23 06:13:05,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:13:05,058 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-12-23 06:13:05,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:13:05,060 INFO L225 Difference]: With dead ends: 234 [2020-12-23 06:13:05,060 INFO L226 Difference]: Without dead ends: 230 [2020-12-23 06:13:05,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:13:05,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-12-23 06:13:05,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 144. [2020-12-23 06:13:05,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-23 06:13:05,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 156 transitions. [2020-12-23 06:13:05,081 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 156 transitions. Word has length 24 [2020-12-23 06:13:05,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:13:05,081 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 156 transitions. [2020-12-23 06:13:05,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:13:05,082 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 156 transitions. [2020-12-23 06:13:05,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:13:05,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:13:05,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:13:05,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:13:05,083 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:13:05,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:13:05,084 INFO L82 PathProgramCache]: Analyzing trace with hash 720092185, now seen corresponding path program 1 times [2020-12-23 06:13:05,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:13:05,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340819389] [2020-12-23 06:13:05,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:13:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:13:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:13:05,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340819389] [2020-12-23 06:13:05,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:13:05,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-12-23 06:13:05,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134130806] [2020-12-23 06:13:05,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:13:05,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:13:05,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:13:05,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:13:05,432 INFO L87 Difference]: Start difference. First operand 144 states and 156 transitions. Second operand 13 states. [2020-12-23 06:13:06,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:13:06,397 INFO L93 Difference]: Finished difference Result 252 states and 273 transitions. [2020-12-23 06:13:06,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:13:06,398 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-12-23 06:13:06,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:13:06,400 INFO L225 Difference]: With dead ends: 252 [2020-12-23 06:13:06,400 INFO L226 Difference]: Without dead ends: 248 [2020-12-23 06:13:06,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:13:06,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-23 06:13:06,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 144. [2020-12-23 06:13:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-23 06:13:06,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 156 transitions. [2020-12-23 06:13:06,418 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 156 transitions. Word has length 26 [2020-12-23 06:13:06,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:13:06,418 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 156 transitions. [2020-12-23 06:13:06,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:13:06,418 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 156 transitions. [2020-12-23 06:13:06,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:13:06,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:13:06,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:13:06,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 06:13:06,420 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:13:06,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:13:06,421 INFO L82 PathProgramCache]: Analyzing trace with hash 586745765, now seen corresponding path program 1 times [2020-12-23 06:13:06,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:13:06,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604493869] [2020-12-23 06:13:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:13:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:13:06,537 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:13:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:13:06,646 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:13:06,700 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 06:13:06,701 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 06:13:06,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 06:13:06,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:13:06 BoogieIcfgContainer [2020-12-23 06:13:06,781 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:13:06,781 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:13:06,781 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:13:06,782 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:13:06,782 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:13:02" (3/4) ... [2020-12-23 06:13:06,785 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 06:13:06,866 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/heap-manipulation/sll_to_dll_rev-1.i-witness.graphml [2020-12-23 06:13:06,867 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:13:06,868 INFO L168 Benchmark]: Toolchain (without parser) took 6630.08 ms. Allocated memory was 162.5 MB in the beginning and 211.8 MB in the end (delta: 49.3 MB). Free memory was 137.2 MB in the beginning and 85.7 MB in the end (delta: 51.5 MB). Peak memory consumption was 101.6 MB. Max. memory is 8.0 GB. [2020-12-23 06:13:06,869 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 162.5 MB. Free memory is still 134.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:13:06,870 INFO L168 Benchmark]: CACSL2BoogieTranslator took 764.88 ms. Allocated memory is still 162.5 MB. Free memory was 137.0 MB in the beginning and 112.7 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:13:06,871 INFO L168 Benchmark]: Boogie Procedure Inliner took 121.79 ms. Allocated memory is still 162.5 MB. Free memory was 112.6 MB in the beginning and 143.5 MB in the end (delta: -30.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 8.0 GB. [2020-12-23 06:13:06,872 INFO L168 Benchmark]: Boogie Preprocessor took 118.67 ms. Allocated memory is still 162.5 MB. Free memory was 143.5 MB in the beginning and 140.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:13:06,873 INFO L168 Benchmark]: RCFGBuilder took 1007.34 ms. Allocated memory is still 162.5 MB. Free memory was 140.4 MB in the beginning and 85.8 MB in the end (delta: 54.5 MB). Peak memory consumption was 54.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:13:06,874 INFO L168 Benchmark]: TraceAbstraction took 4523.70 ms. Allocated memory was 162.5 MB in the beginning and 211.8 MB in the end (delta: 49.3 MB). Free memory was 85.3 MB in the beginning and 90.4 MB in the end (delta: -5.1 MB). Peak memory consumption was 45.2 MB. Max. memory is 8.0 GB. [2020-12-23 06:13:06,874 INFO L168 Benchmark]: Witness Printer took 85.51 ms. Allocated memory is still 211.8 MB. Free memory was 90.4 MB in the beginning and 85.7 MB in the end (delta: 4.7 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-12-23 06:13:06,879 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 162.5 MB. Free memory is still 134.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 764.88 ms. Allocated memory is still 162.5 MB. Free memory was 137.0 MB in the beginning and 112.7 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 121.79 ms. Allocated memory is still 162.5 MB. Free memory was 112.6 MB in the beginning and 143.5 MB in the end (delta: -30.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 118.67 ms. Allocated memory is still 162.5 MB. Free memory was 143.5 MB in the beginning and 140.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1007.34 ms. Allocated memory is still 162.5 MB. Free memory was 140.4 MB in the beginning and 85.8 MB in the end (delta: 54.5 MB). Peak memory consumption was 54.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4523.70 ms. Allocated memory was 162.5 MB in the beginning and 211.8 MB in the end (delta: 49.3 MB). Free memory was 85.3 MB in the beginning and 90.4 MB in the end (delta: -5.1 MB). Peak memory consumption was 45.2 MB. Max. memory is 8.0 GB. * Witness Printer took 85.51 ms. Allocated memory is still 211.8 MB. Free memory was 90.4 MB in the beginning and 85.7 MB in the end (delta: 4.7 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 565]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L639] const struct node *p1, *p2; [L588] struct node *list = ((void *)0); [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node [L591] COND FALSE !(__VERIFIER_nondet_int()) [L592] EXPR \read(*list) [L592] *pp2 = list [L593] COND FALSE !(__VERIFIER_nondet_int()) [L595] EXPR \read(*list) [L595] *pp1 = list [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node [L598] COND FALSE !(__VERIFIER_nondet_int()) [L599] EXPR \read(*list) [L599] return list; [L588] struct node *list = ((void *)0); [L599] return list; [L640] struct node *list = create_sll(&p1, &p2); [L642] \read(*p1) [L642] \read(*p2) [L626] COND FALSE !(!(beg)) [L627] COND FALSE !(!(end)) [L628] EXPR beg->next [L628] beg = beg->next [L628] COND TRUE end != beg [L629] COND TRUE !(beg) [L565] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 147 locations, 20 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.3s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 373 SDtfs, 843 SDslu, 1471 SDs, 0 SdLazy, 678 SolverSat, 126 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=147occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 190 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 22690 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...